EP0730710B1 - Inhalator mit einrichtung für drehmomentübertragung in einer drehrichtung - Google Patents

Inhalator mit einrichtung für drehmomentübertragung in einer drehrichtung Download PDF

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Publication number
EP0730710B1
EP0730710B1 EP95903582A EP95903582A EP0730710B1 EP 0730710 B1 EP0730710 B1 EP 0730710B1 EP 95903582 A EP95903582 A EP 95903582A EP 95903582 A EP95903582 A EP 95903582A EP 0730710 B1 EP0730710 B1 EP 0730710B1
Authority
EP
European Patent Office
Prior art keywords
shaft
annular member
outer annular
inhaler
driving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95903582A
Other languages
English (en)
French (fr)
Other versions
EP0730710A1 (de
Inventor
Peter David Hodson
Stephen John Howgill
Anthony Charles Lammond Wass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AstraZeneca AB
Original Assignee
AstraZeneca AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AstraZeneca AB filed Critical AstraZeneca AB
Publication of EP0730710A1 publication Critical patent/EP0730710A1/de
Application granted granted Critical
Publication of EP0730710B1 publication Critical patent/EP0730710B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/18—Freewheels or freewheel clutches with non-hinged detent

Definitions

  • This invention relates to an inhaler comprising a device for the transmission of one-way torque and in particular to a device which may readily be moulded from plastics and can transmit high driving forces.
  • Devices for transmission of one-way torque are well known, common examples include a socket wrench and the winding mechanism of a clockwork motor, watch, clock etc.
  • Generally such devices comprise at least one metal part and a biasing spring to bias a pawl in engagement with the teeth of a ratchet wheel.
  • W090/13328 discloses a dry powder inhalation device comprising a housing defining a chamber in communication with a patient port in the form of a mouthpiece or nasal adaptor, and an elongate carrier bearing a powdered medicament, the device being constructed and arranged such that areas of predetermined size of the elongate carrier may sequentially be exposed within the chamber, the device comprising one or more air inlets such that when a patient inhales through the patient port an air flow is established from the air inlet(s) to the patient port through the chamber such that particles of the powdered medicament of respirable size from said exposed area of the elongate carrier are entrained within the air flow.
  • the elongate carrier is preferably in the form of a tape having a surface with grooves, pores, apertures or other embossed features which contain particles of medicament.
  • the tape is conveniently wound on a supply spool and preferably contained within a cassette having a supply and take-up spool.
  • the tape may contain many doses of the drug e.g. 200 doses.
  • areas of the tape are sequentially advanced into the chamber to dispense the medicament contained within that area of tape. It is essential that the tape is advanced in well defined steps from the supply to the take-up spool to facilitate accurate, reproducible dosing and to prevent drug wastage.
  • the advancement of the tape is conveniently facilitated by pivotal movement of a lever, either in a similar manner to the winder lever of a camera, or more preferably in the form of a mouthpiece cover, such that the tape is automatically advanced when the patient opens the cover.
  • Such arrangements require an efficient one-way drive providing precisely controlled advancement and so that closure of the cover causes no movement of the tape.
  • the requirements of such a drive mechanism for use in an inhaler are manifold. It is desirable that the mechanism be cheap, preferably injection moulded in a minimum number of plastic parts.
  • the device should be compact and lightweight, able to transmit large drive forces in relation to the torque needed to reverse the mechanism, capable of achieving low levels of variation in any lost motion, reliable, able to withstand temperatures of -20°C to +70°C for several hours without creeping or stress relaxing when "parked” in any configuration, able to resist wear and tear after prolonged usage (several thousand operations in each direction), reasonably immune to dirt or powder ingress, cheap to assemble, and quiet in operation.
  • an inhaler having an elongate carrier bearing powdered medicament and an advancement means for moving the carrier to position an area of the carrier in a predetermined place for dispensing medicament, characterised in that the advancement means comprises a device for the transmission of one-way torque comprising:
  • the driving surfaces of the teeth and slider or pawl are preferably substantially radial and the length of the slider or pawl allows engagement of only one of the drive elements at a time.
  • Either the shaft or the outer annular member may be connected to a drive means e.g. lever, inhaler cover etc.
  • the drive means is connected to the shaft.
  • the outer annular member may be axially connected to a spool etc. or may comprise gear teeth moulded onto its radially outer surface which may be used to drive a spool etc. via a gear wheel.
  • Figure 1 shows a cross-section through a transmission device for use in the invention comprising an outer annular member (2) having 16 inwardly projecting teeth (4) each comprising a driving surface (6) and a cam surface (8).
  • the annular member (2) may be a gear wheel having gear teeth (not shown) projecting radially outwardly.
  • a shaft (10) is concentrically mounted within the outer annular member (2) and is associated with two drive elements (12,14) which are joined to form a slider (16).
  • Each drive element (12,14) comprises a driving surface (18,20) and a cam surface (22,24).
  • the slider (16) is located within channel (26) within the shaft (10) and is free to reciprocate in the radial direction. In order to minimise friction between the slider (16) and the walls of the channel the surface areas in contact are reduced by the presence of rounded projections (28) extending from the wall of the channel (26). It will be appreciated such projections may equally well be present on the slider (16).
  • the shaft (10) may be attached to a lever (not shown) e.g. the pivoting cover of an inhaler, to cause rotional movement of the shaft (10).
  • a further advantage of the device is the lack of potential creep of such a plastic ratchet mechanism.
  • Most known ratchets require springs of some nature for them to operate correctly. The choice is usually either a metal spring, which can be expensive, hard to produce accurately to small tolerances, and may cause substantial wear of other fine plastics parts, or a plastics spring which will suffer from creep or stress relaxation if parked under any significant loading force at elevated temperatures.
  • Most simple fine scale plastics ratchet mechanisms are unable to ensure that parking cannot occur with a spring in a loaded configuration and leaving most such mechanisms in a hot car in bright sunshine, a few hours at 50°C, for example, would be sufficient for enough creep to occur to prevent the ratchet functioning properly again.
  • the device of Figure 1 has no spring function, however, so is not susceptible to such a creep problem.
  • Figure 2 shows the slider (16) provided with two plastic spring wings (30), the ends of which are retained within recesses (32).
  • the wings (30) may be formed integrally with the slider (16).
  • the wings (30) have a bistable action tending to move the slider (16) towards one of its ends or the other with a snap action.
  • Full engagement of a drive element at the end of the slider with a tooth (4) will thus tend to be more assured, reducing the possibility of tip wear of the slider due to large torques being transmitted via too small a tip/tooth overlap.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Retarders (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Lubricants (AREA)
  • External Artificial Organs (AREA)
  • Basic Packing Technique (AREA)
  • Gear Transmission (AREA)
  • Power Steering Mechanism (AREA)

Claims (6)

  1. Inhaliergerät mit einem länglichen Träger, der ein pulverförmiges Medikament aufnimmt, und einem Fortbewegungsmittel zum Bewegen des Trägers, um einen Bereich des Trägers an einem vorbestimmten Ort zur Ausgabe des Medikamentes zu positionieren, dadurch gekennzeichnet, dass das Fortbewegungsmittel eine Vorrichtung zur Übertragung eines Drehmomentes in einer Richtung aufweist, die folgendes umfasst:
    ein äußeres Ringelement (2) mit einer Mehrzahl von radial nach innen vorstehenden Zähnen (4), wobei jeder Zahn (4) eine Mitnahmefläche (6) und eine Nockenfläche (8) aufweist,
    eine Welle (10), die konzentrisch in Bezug auf das äußere Ringelement montiert ist, wobei die Welle eine Mehrzahl von Antriebselementen (12, 14) umfasst, die jeweils eine Mitnahmefläche (18, 20) und eine Nockenfläche (22, 24) aufweisen, wobei zwei der genannten Antriebselemente miteinander verbunden sind und einen Schieber (16) bilden, der im wesentlichen diametral über die Welle verläuft, wobei die genannten Antriebselemente so auf der Welle montiert sind, dass eine radiale Bewegung relativ zur Welle möglich ist, sodass:
    eine Rotation der Welle oder des äußeren Ringelementes in seiner Mitnahmerichtung ein Eingreifen einer Mitnahmefläche (18, 20) von wenigstens einem Antriebselement (12, 14) in eine Mitnahmefläche (6) von wenigstens einem Zahn (4) bewirkt, wodurch sich eine gemeinsame Rotation der Welle und des äußeren Ringelementes ergibt, und
    eine Rotation der Welle oder des äußeren Ringelementes in der der Mitnahmerichtung entgegengesetzten Richtung einen Eingriff der Nockenfläche (22, 24) von wenigstens einem Antriebselement (12, 14) in die Nockenfläche (8) von wenigstens einem Zahn bewirkt, was eine zusätzliche relative, im wesentlichen radiale, Bewegung zwischen dem genannten Antriebselement und dem genannten Zahn ergibt, wodurch verhindert wird, dass eine Drehbewegung zwischen der genannten Welle und dem genannten äußeren Ringelement übertragen wird,
    wobei der genannte Eingriff der Mitnahmeflächen in die Nockenflächen keine Federvorspannmittel erfordert.
  2. Inhaliergerät nach Anspruch 1, bei dem der Schieber in einem Kanal (26) in der Welle gehalten wird.
  3. Inhaliergerät nach Anspruch 1 oder Anspruch 2, bei dem das äußere Ringelement wenigstens acht feste, radial nach innen vorstehende Zähne umfasst.
  4. Inhaliergerät nach einem der vorherigen Ansprüche, bei dem der Schieber bis zu seinen äußersten Radialpositionen bistabil ist.
  5. Inhaliergerät nach einem der vorherigen Ansprüche, bei dem das Fortbewegungsmittel vollkommen aus Kunststoff hergestellt ist.
  6. Inhaliergerät nach Anspruch 5, bei dem der Kunststoff Polyacetal ist.
EP95903582A 1993-11-26 1994-11-21 Inhalator mit einrichtung für drehmomentübertragung in einer drehrichtung Expired - Lifetime EP0730710B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB939324391A GB9324391D0 (en) 1993-11-26 1993-11-26 Device for transmission of one-way torque
GB9324391 1993-11-26
PCT/US1994/013464 WO1995014867A1 (en) 1993-11-26 1994-11-21 Device for transmission of one-way torque

Publications (2)

Publication Number Publication Date
EP0730710A1 EP0730710A1 (de) 1996-09-11
EP0730710B1 true EP0730710B1 (de) 2000-09-20

Family

ID=10745785

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95903582A Expired - Lifetime EP0730710B1 (de) 1993-11-26 1994-11-21 Inhalator mit einrichtung für drehmomentübertragung in einer drehrichtung

Country Status (14)

Country Link
US (1) US6102179A (de)
EP (1) EP0730710B1 (de)
JP (1) JP3635308B2 (de)
AT (1) ATE196534T1 (de)
AU (1) AU687959B2 (de)
CA (1) CA2177360A1 (de)
DE (1) DE69425978T2 (de)
DK (1) DK0730710T3 (de)
ES (1) ES2152378T3 (de)
GB (1) GB9324391D0 (de)
GR (1) GR3035086T3 (de)
PT (1) PT730710E (de)
SG (1) SG49151A1 (de)
WO (1) WO1995014867A1 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10218664A1 (de) * 2002-04-26 2003-11-13 Sram De Gmbh Freilaufnabe
GB0317374D0 (en) * 2003-07-24 2003-08-27 Glaxo Group Ltd Medicament dispenser
GB0418278D0 (en) * 2004-08-16 2004-09-15 Glaxo Group Ltd Medicament dispenser
GB0515584D0 (en) * 2005-07-28 2005-09-07 Glaxo Group Ltd Medicament dispenser
US8517019B2 (en) * 2006-03-03 2013-08-27 3M Innovative Properties Company Method and apparatus for metered dose dispensing
GB0605150D0 (en) 2006-03-14 2006-04-26 Glaxo Group Ltd Counter For Use With A Medicament Dispenser
GB0605723D0 (en) 2006-03-23 2006-05-03 3M Innovative Properties Co Powder filling processes
GB0622827D0 (en) * 2006-11-15 2006-12-27 Glaxo Group Ltd Sheet driver for use in a drug dispenser
EP2534958A1 (de) 2007-12-14 2012-12-19 AeroDesigns, Inc Abgabe von Aerosol-sprühbaren Nahrungsmittelprodukten
WO2010135253A2 (en) * 2009-05-18 2010-11-25 3M Innovative Properties Company Dry powder inhaler dose counters
US20100301609A1 (en) * 2009-05-30 2010-12-02 Chong Hun Kim River-Flow Electricity Generation
EP2874928B1 (de) 2012-07-19 2016-06-15 Adamis Pharmaceuticals Corporation Pulverzufuhrvorrichtung
CN105324586B (zh) * 2013-05-22 2018-12-07 舍弗勒技术股份两合公司 空程装置
DE102013219880B4 (de) * 2013-10-01 2015-09-10 Schaeffler Technologies AG & Co. KG Freilauf, der einfach aufgebaut, kostengünstig herstellbar und montierbar ist
DE102013227008B4 (de) 2013-12-20 2021-08-12 Seg Automotive Germany Gmbh Andrehvorrichtung und Verfahren hierzu
GB201702473D0 (en) * 2017-02-15 2017-03-29 Univ Newcastle Gear
JP6920728B2 (ja) * 2017-09-14 2021-08-18 下西技研工業株式会社 ワンウェイクラッチおよびワンウェイクラッチ付き回転ダンパ装置
JP7219948B2 (ja) * 2018-06-11 2023-02-09 下西技研工業株式会社 ワンウェイクラッチおよびワンウェイクラッチ付き回転ダンパ装置

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US203519A (en) * 1878-05-07 Improvement in pawl-and-ratchet devices
GB314892A (en) * 1928-07-04 1929-10-24 Paul Duluc An improved free-wheel mechanism
BE354444A (de) * 1928-09-24 1928-10-31
GB346548A (en) * 1930-03-19 1931-04-16 Jonas Arthur Knight Improvements in power transmission mechanism
GB556080A (en) * 1941-02-12 1943-09-20 Clemson Bros Inc Improved free-wheel or ratchet clutch mechanism
US2905294A (en) * 1956-03-12 1959-09-22 Clemson Bros Inc Shuttle-pin clutch drive mechanism for lawn mowers
GB908128A (en) * 1958-06-10 1962-10-17 Andre Duban Improvements in or relating to ratchet-and-pawl devices
US3300003A (en) * 1964-11-25 1967-01-24 Eastman Kodak Co Unidirectional clutch mechanism
US4570769A (en) * 1981-11-26 1986-02-18 Kabushiki Kaisha Sankyo Seiki Seisakusho Ratchet mechanism
DE3440264A1 (de) * 1984-11-03 1986-05-15 Rudolf Wittner Gmbh U. Co, 7972 Isny Aufziehbares uhrwerk fuer metronom
US5000721A (en) * 1987-08-20 1991-03-19 Itt Corporation Clutch apparatus
EP0705614B1 (de) * 1989-04-28 2002-09-25 Riker Laboratories, Inc. Inhalationsvorrichtung für Trockenpulver
GB8909891D0 (en) * 1989-04-28 1989-06-14 Riker Laboratories Inc Device

Also Published As

Publication number Publication date
JP3635308B2 (ja) 2005-04-06
SG49151A1 (en) 1998-05-18
AU1258695A (en) 1995-06-13
PT730710E (pt) 2001-03-30
US6102179A (en) 2000-08-15
GB9324391D0 (en) 1994-01-12
ES2152378T3 (es) 2001-02-01
JPH10501869A (ja) 1998-02-17
CA2177360A1 (en) 1995-06-01
AU687959B2 (en) 1998-03-05
DE69425978D1 (de) 2000-10-26
GR3035086T3 (en) 2001-03-30
WO1995014867A1 (en) 1995-06-01
EP0730710A1 (de) 1996-09-11
ATE196534T1 (de) 2000-10-15
DK0730710T3 (da) 2001-01-29
DE69425978T2 (de) 2001-05-10

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